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help / color / mirror / Atom feedFrom: hubert depesz lubaczewski <[email protected]>
To: PostgreSQL General <[email protected]>
Subject: Is there any reason why pg_walfile_name() doesn't take timeline change into consideration?
Date: Mon, 18 May 2026 14:27:08 +0200
Message-ID: <[email protected]> (raw)
Hi,
I tried on a server that is on timeline 7 now, with .history being:
1 A9/5E0000A0 no recovery target specified
2 127/EB0000A0 no recovery target specified
3 127/F40000A0 no recovery target specified
4 128/170000A0 no recovery target specified
5 188/C70000A0 no recovery target specified
6 7B8/90000A0 no recovery target specified
When I wal file that is "current", i get sensible filename:
=# select pg_walfile_name('800/123');
pg_walfile_name
══════════════════════════
000000070000080000000000
(1 row)
But when I try to find walfile for old lsn, from older timeline, I'm getting bad results:
=# select pg_walfile_name('125/123');
pg_walfile_name
══════════════════════════
000000070000012500000000
(1 row)
Timeline 7 was was "there" when wal lsn was 125/…. Is it just missing
functionality, or am I missing something more complicated?
Best regards,
depesz
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